I have an iMac running OS X 10.6.8. The processor is a 2.8 GHz Intel Core i7 and the machine has 4 GB of RAM. How can I boot the computer in 64-bit mode (instead of 32-bit mode) so that I can upgrade ...

The Mac Pro from 2008 (MacPro3,1) is still a fairly relevant machine in the modern OS X as not only does it run the latest releases of OSX, but also the 8 CPU cores that it came with provide enough ...

Today I took part in an interesting discussion. Someone said that's great that Apple goes 64bit with their iPhone 5S. Of course I mentioned about no need for 64bits paired with 2 gigs of RAM, but then ...

My understanding is that the (main) reason of having a 64 bit processor, is to be able to use more than 4 GB of RAM.
In PCs, it is now very common to have more than 4GB of ram, and to really be able ...

I want to install the 64-bit OS X 10.7 on my MacbookPro 2,1, which has a 64-bit processor, but only 32-bit EFI and Kernel Boot mode.
I know that this is not officially supported, but I assume there ...

We're trying to decide how much effort to put into ensuring that our software works well in 32-bit mode. (It's scientific software that must handle large datasets, so ensuring that it works well does ...

I'm running an Early '11 MacBook Pro with 16GB RAM.
Currently, OS X Lion runs in 32-bit mode by default, and an important piece of software I use for work requires this mode (Cisco VPN client). Most ...

I know that many apple laptops such as my Macbook 6,1 run a 32 bit kernel in OS X Snow Leopard. The kernel according to Apple can also run or "support" 64 bit applications. My question is how does the ...

When playing Minecraft 1.0, a java-based game, when I switch the rendering options to "Far", the game shows a message saying that memory usage for the game might be too high in Far rendering mode, and ...

I am using windows 7 64 bit on hp probook 4520s and want to install quicktime, apple provided link give the quicktime to download and install but it give error of some assembly instruction. I think ...

I followed the guide at
http://macperformanceguide.com/SnowLeopard-64bit.html
to boot into 64-bit mode. I had no problems with the instructions and on the boot screen it says "PAE enabled, 64bit mode ...